This erratum applies to the following SoCs: P4080 rev 1.0, 2.0, fixed in rev 3.0 P2041 rev 1.0, 1.1, fixed in rev 2.0 P3041 rev 1.0, 1.1, fixed in rev 2.0.
Workaround for erratum NMG_CPU_A011 is now enabled by default. It can be disabled by hwconfig with syntax:
fsl_cpu_a011:disable
Signed-off-by: York Sun yorksun@freescale.com --- arch/powerpc/cpu/mpc85xx/cpu_init.c | 18 +++++++++++------- arch/powerpc/cpu/mpc85xx/release.S | 2 +- 2 files changed, 12 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c index 026fa63..58b10fb 100644 --- a/arch/powerpc/cpu/mpc85xx/cpu_init.c +++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c @@ -317,14 +317,15 @@ int cpu_init_r(void) * CPU22 and NMG_CPU_A011 share the same workaround. * CPU22 applies to P4080 rev 1.0, 2.0, fixed in 3.0 * NMG_CPU_A011 applies to P4080 rev 1.0, 2.0, fixed in 3.0 - * also applies to P3041 rev 1.0, 1.1, P2041 rev 1.0, 1.1 - * NMG_CPU_A011 is activated by hwconfig with syntax: - * fsl_cpu_a011:enable + * also applies to P3041 rev 1.0, 1.1, P2041 rev 1.0, 1.1, both + * fixed in 2.0. NMG_CPU_A011 is activated by default and can + * be disabled by hwconfig with syntax: + * + * fsl_cpu_a011:disable */ extern int enable_cpu_a011_workaround; #ifdef CONFIG_SYS_P4080_ERRATUM_CPU22 - enable_cpu_a011_workaround = - (SVR_SOC_VER(svr) != SVR_P4080 || SVR_MAJ(svr) < 3); + enable_cpu_a011_workaround = (SVR_MAJ(svr) < 3); #else char buffer[HWCONFIG_BUFFER_SIZE]; char *buf = NULL; @@ -332,9 +333,12 @@ int cpu_init_r(void) if (getenv_f("hwconfig", buffer, sizeof(buffer)) > 0) buf = buffer;
- if (hwconfig_arg_cmp_f("fsl_cpu_a011", "enable", buf) > 0) { + if (hwconfig_arg_cmp_f("fsl_cpu_a011", "disable", buf) > 0) + enable_cpu_a011_workaround = 0; + else { enable_cpu_a011_workaround = - (SVR_SOC_VER(svr) != SVR_P4080 || SVR_MAJ(svr) < 3); + (SVR_SOC_VER(svr) == SVR_P4080 && SVR_MAJ(svr) < 3) || + (SVR_SOC_VER(svr) != SVR_P4080 && SVR_MAJ(svr) < 2); } #endif if (enable_cpu_a011_workaround) { diff --git a/arch/powerpc/cpu/mpc85xx/release.S b/arch/powerpc/cpu/mpc85xx/release.S index b8d4a37..1555a9b 100644 --- a/arch/powerpc/cpu/mpc85xx/release.S +++ b/arch/powerpc/cpu/mpc85xx/release.S @@ -359,7 +359,7 @@ __spin_table: .align L1_CACHE_SHIFT .global enable_cpu_a011_workaround enable_cpu_a011_workaround: - .long 0 + .long 1
/* Fill in the empty space. The actual reset vector is * the last word of the page */